ENGINEX CNC harmonic gearbox, robotic arm gearbox, harmonic drive, gear, bangle gearbox

EGX-40

The Harmonic Drive Model 40 series is a high‑precision gear reducer designed for robotics, CNC machinery, and automation systems requiring a compact size with exceptional torque capacity.

High Torque Density: Delivers rated torque from 137 Nm up to 294 Nm, with momentary peak torque reaching 1180 Nm in larger variants.

Precision Accuracy: Maintains positioning accuracy within ≤20 arc‑minutes, ensuring reliable motion control.

With repeated peak torque ratings up to 617 Nm and backdriving resistance, it provides stability under dynamic loads.

We offer a comprehensive range of harmonic gear reducers in multiple sizes and reduction ratios to meet the specific requirements of machine tools, CNC equipment, robotics, automation systems, semiconductor machinery, packaging equipment, medical devices, and other precision motion control applications.

Key Features

Zero backlash for superior positioning accuracy
High torque density in a compact design
Excellent repeatability and precision
High reduction ratios in a single stage
Smooth, quiet, and efficient operation
Long service life with minimal maintenance
Available in various sizes and gear ratios to suit diverse applications
Applications:
Suitable for a robot arm
CNC machine tool drives
CNC machine in a rotating axis where high torque and accuracy are required
Applied in the robot industry, especially for multi-axis robot joints
Aerospace and defense actuation systems
Precision automation requiring high torque and a compact footprint

We at NK Automations are a premier supplier and manufacturer of high-precision gearboxes. Our gearboxes offer several advantages, including robust construction, heavy-duty performance, zero backlash, and high positional accuracy. Notably, we also provide after-sales services for all our products, which distinguishes NK Automations as the preferred choice for various industries such as robotics, CNC machinery, CNC bangle engraving machines, special-purpose machines (SPM), medical equipment, semiconductor manufacturing, satellite communications, and assembly automation applications.

An industrial gearbox is a sealed system that conveys mechanical energy from a servo motor to an output device. These gearboxes are capable of adjusting their speed, torque, and other characteristics to convert energy into a usable format. They are utilized across numerous machines for diverse applications. These machines can reduce rotational speed to enhance torque and speed.

Exceptional Positional Accuracy and Repeatability
Zero Backlash
High Torque – no more need of Brake Servo motor
High Efficiency
High Reduction Ratios in a Single Stage
Compact and Light Weight
High Torsional Stiffness
Fully Back Drivable
High load capacity output bearings

Ratio	Rated Torque (Nm)	Starting Torque (N·m)	Repeated Peak Torque (Nm)	Starting Torque (N·m)	Average Torque (Nm)	Backdriving Torque (N·m)	Momentary Peak Torque (Nm)	Starting Torque (N·m)	Input Speed (rpm)	Max Output Speed (rpm)	Accuracy (arc‑min)	Service Life (h)
40	137	14	402	41	196	20	686	70	4000	3000	≤20	10,000
80	206	21	519	53	284	29	980	100	—	—	—	15,000
100	265	27	568	58	372	38	1080	110	—	—	—	15,000
120	294	30	617	63	451	46	1180	120	—	—	—	15,000

Harmonic Drive 40 Model

EGX-40

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